On my js:
var mt = document.getElementById(“tab_parent”); # tried also with tab_files or tab_folder
mt.tabs(“tab_files”).attachList( …
and I receive:
tab_parent.tabs is not a function
with a:
console.log(mt);
I see:

that it's right to see since I defined tab_parent as dhtmlxTabBar class, but how to access to the dhtmlxTabBar obj instance?